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    Microstructure study on volcano ash geopolymer aggregate at different sintering temperature 

    Rafiza, Abdul Razak; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr.; Djwantoro, Hardjito, Dr.; Wan Hamidon Wan Badaruzzaman, Ir. Dr.; Zarina, Yahya (Trans Tech Publications, 2014)
    Recent research shows that the by-product materials such as fly ash can be used as raw material in producing aggregates and lightweight aggregates. The usage of this material can improve the quality of the aggregates ...
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    Effect on strength and hardness of clay ceramic substrate after treatment using koalin based geopolymer glaze 

    Mohd Mustafa Al Bakri, Abdullah; Liyana, Jamaludin; Muhammad Faheem, Mohd Tahir; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Rafiza, Abdul Razak; Zarina, Yahya; Alida, Abdullah (Trans Tech Publications, 2014)
    Geopolymerization is an alternative for ceramic industry by using clay based material such as kaolin or calcined kaolin geopolymer. Geopolymer paste is initially produced by alkaline activation of calcined kaolin with NaOH ...
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    Effect of Solids-To-Liquids, Na2SiO3-To-NaOH and Curing Temperature on the Palm Oil Boiler Ash (Si + Ca) Geopolymerisation System 

    Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin; Khairul Nizar, Ismail; Rafiza, Abd Razak; Sandu, Andrei Victor (MDPI AG, 2015)
    This paper investigates the effect of the solids-to-liquids (S/L) and Na2SiO3/NaOH ratios on the production of palm oil boiler ash (POBA) based geopolymer. Sodium silicate and sodium hydroxide (NaOH) solution were used as ...
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    A Review on the Manufacturing of Lightweight Aggregates Using Industrial By-Product 

    Nor Aiman, Mahmad; Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Rafiza, Abd Razak; Januarti Jaya, Ekaputri; M. A., Faris; Hazamaah, Nur Hamzah (EDP Sciences, 2016-10)
    The waste materials from industrial are one of the concern issues in sustainable development. Recycle and reduce the waste material is one of the strategies to produce the better sustainable system. One of the methods is ...
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    Behavior of alkali-activated fly ash through underwater placement 

    Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Li, Long-yuan; Nergis, Dumitru Doru Burduhos; Muhammad Aiman Asyraf, Zainal Hakimi; Sandu, Andrei Victor; Vizureanu, Petrica; Rafiza, Abd Razak (MDPI AG, 2021-11-14)
    Underwater concrete is a cohesive self-consolidated concrete used for concreting underwater structures such as bridge piers. Conventional concrete used anti-washout admixture (AWA) to form a high-viscosity underwater ...
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    Durability of geopolymer lightweight concrete infilled LECA in seawater exposure 

    Rafiza, Abd Razak; Mohd Mustafa Al Bakri, Abdullah; Zarina, Yahya; M. S. A. Hamid (IOP Publishing Ltd, 2017-11)
    This paper describes a development of lightweight concrete using lightweight expanded clay aggregate (LECA) in fly ash (FA) based geopolymer immersed in seawater. The objective of this research is to compare the performance ...
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    Paraffin as a phase change material in concrete for enhancing thermal energy storage 

    Rafiza, Abd Razak; Khang Zhe, Adeline Choo; Mohd Mustafa Al Bakri, Abdullah; Zarina, Yahya; Subaer, Junaidi; Khairunnisa, Muhamad; Nurul Aida, Mohd Mortar (IOP Publishing Ltd, 2020-02)
    Phase change material (PCM) for thermal energy storage (TES) is the material that can absorb energy during heating process as phase change takes place and release energy to environment during cooling process. Nowadays, ...
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    Seawater exposure effect on fly ash based geopolymer concrete with inclusion of steel fiber 

    Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Yee Jing, Leow; Long-Yuan, Li; Rafiza, Abd Razak (IOP Publishing Ltd, 2020-02)
    Concrete is widely used in construction offshore such as concrete floating bridges and sea tank. This research is providing an alternative construction material to replace ordinary Portland cement (OPC) concrete known as ...
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    Influence of kaolin in fly ash based geopolymer concrete: destructive and non-destructive testing 

    Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; N. Mohd Ramli; Burduhos-Nergis, D. D.; Rafiza, Abd Razak (IOP Publishing Ltd, 2018-06)
    Development of geopolymer concrete is mainly to reduce the production of ordinary Portland cement (OPC) that adverse the natural effect. Fly ash is a by-product collected from electrical generating power plant which resulted ...
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    Durability of fly ash based geopolymer concrete infilled with rubber crumb in seawater exposure 

    Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; S. N. H. Ramli; Minciuna, M. G.; Rafiza, Abd Razak (IOP Publishing Ltd, 2018-06)
    Geopolymer is an alternative binder to replace Ordinary Portland Cement (OPC)in construction industry. Source materials that rich in silica (Si) and alumina (Al) were activated by using alkaline solution. Production of ...
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    Mohd Mustafa Al Bakri, Abdullah (21)
    Zarina, Yahya (21)
    Rafiza, Abdul Razak (12)Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr. (11)Rafiza, Abd Razak (9)... View MoreSubjectGeopolymer (12)Alkaline activator (3)Compressive strength (3)Geopolymer concrete (3)Geopolymers (3)... View MoreDate Issued2021 (1)2020 (2)2018 (2)2017 (1)2016 (2)2015 (2)2014 (2)2013 (5)2012 (4)

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